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Electron Capture - X-ray or gamma-ray?

  1. Apr 16, 2015 #1
    I may be being a bit pedantic but when an electron "falls" (or is captured by) into the nucleus, does the outer shell electron that fills its place result in an x-ray or a gamma-ray being emitted? Or would it depend on the energy transition?

    Thanks for any ideas.
     
  2. jcsd
  3. Apr 16, 2015 #2

    davenn

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    from Wiki ....


    does that answer you Q ?

    Dave
     
  4. Apr 16, 2015 #3
    Hmm, sorry should have checked Wiki. Yes very helpful, thankyou!
     
  5. Apr 16, 2015 #4

    davenn

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    no probs, you are welcome :smile:
     
  6. Apr 16, 2015 #5

    ChrisVer

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    In general, keep in mind, that electron shell transitions don't produce gamma rays but X-rays... The transitions of nuclei are the ones producing gamma rays.

    http://en.wikipedia.org/wiki/Gamma_ray
     
  7. Apr 16, 2015 #6

    mfb

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    That has its own problems. Thorium 229 has an excitation just 8 eV above the ground state, the corresponding "gamma ray" is in the ultraviolet range.
     
  8. Apr 16, 2015 #7

    ChrisVer

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    Exceptional things always exist... doesn't change the fact that the heavy atoms generally tend to emit in the X-rays (keV spectra), while nuclei in general tend to emit in the MeV ranges (gamma).
     
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